19.3 arterioles ( arteirs)

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6 Terms

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arterioles

smallest of all arteries

2
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larger arterioles contain

all 3 tunics

-Tunica intima, Tunica media, Tunica externa

3
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smaller arterioles are mostly single layer of

-smooth muscle surrounding endothelial cells

4
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Arterioles control flow into

capillary beds - via vasodilation & vasoconstriction of smooth muscle

5
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Arterioles are also called

resistance arteries

-changing diameters change resistance to blood flow

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Leads to

capillary beds